Strategic Overview: Particle and Particle Astrophysics

Transcription

1 Strategic Overview: Particle and Particle Astrophysics Persis S. Drell Deputy Director Director, Particle and Particle Astrophysics 1/24/2006 EPAC 1

2 SLAC: A Lab in Transition SLAC s research vision is evolving dramatically. The balance and content of the scientific foci is changing in substantial ways Photon science is rapidly expanding It will be the dominant laboratory program by the end of the decade. In 2009, the major accelerator-based facilities will both be primarily serving photon science Particle Physics and Particle Astrophysics Will no longer have forefront accelerator based HEP program on site. Non-accelerator efforts will grow Will be serving user community at accelerator facilities that will be off site e.g. ILC; other potential accelerator opportunities 1/24/2006 EPAC 2

3 Photon Science Future X-Rays have opened the Ultra-Small World -- Realm of SPEAR photons/sec from high brightness undulator 400 ev 40 KeV 50 ps pulse limited coherence at x-ray wavelengths X-ray Lasers will open the Ultra-Small and Ultra-Fast Worlds Realm of LCLS photons/pulse 800 ev 9 KeV 200 fs pulse at commissioning few * 10 fs within 1-2 years fully coherent at x-ray wavelengths 1/24/2006 EPAC 3

4 Linac Coherent Light Source LCLS Will Be The World s First X-ray Laser 1/24/2006 EPAC 4

5 LCLS: Remarkable Opportunities for Discovery Femtochemistry and Biology Nanostructured Materials Atomic Physics Plasmas and Warm Dense Matter Imaging of Nanoclusters and Single Biomolecules X-ray Laser Physics 1/24/2006 EPAC 5

6 Changes to Optimize Lab for its Future New Laboratory Organization and Management Structure New structure is built around four new directorates -- Particle & Particle Astrophysics, Photon Science, LCLS Construction, and Operations. Lab is better positioned to serve the two science focus areas New structure stresses the importance of strong and effective line management at the laboratory 1/24/2006 EPAC 6

7 Previous SLAC Organization 1/24/2006 EPAC 7

8 1/24/2006 EPAC 8

9 1/24/2006 EPAC 9

10 An Exciting and Challenging Time in Field of Particle Physics The Standard Model of quarks and leptons is fabulously successful---and fabulously incomplete It only describes ~5% of the Universe Compelling Questions confront us Within this decade a new accelerator is coming on line with potential to make dramatic progress in our understanding LHC We are also developing the accelerator for discovery in the next decade: ILC Non accelerator strategies essential components achieving our scientific goals Long term health and future of the field of HEP relies on ILC Excellent progress towards international realization of such a machine---but not a certainty Budgets are very constrained 1/24/2006 EPAC 10

11 SLAC PPA Program: Exploiting the present and preparing for the future Science now or soon B Factory (operations to 2008) GLAST ( /17) SLAC Participation in the LHC (2007 and beyond) Proof of principle experiments in accelerator research R&D for science in the next decade (2010 and beyond) ILC (2016?) LSST (first light 2012??) JDEM (20??) EXO (2012?? if R&D successful) R&D for farther future Accelerator Research FFTB SABER 1/24/2006 EPAC 11

12 Programmatic Priorities For the near term: We must focus on B-factory performance and delivery of science to our largest user community For the mid term: We must continue in our leadership role for the ILC Highest priority new facility for the world community We must complete GLAST construction and develop the ISOC Deliver the science to the user community We must work to provide additional opportunities for science to the HEP user community in ~2012 e.g. LHC, LSST, EXO, JDEM,... For the long term: The R&D in accelerator science is our hope for the future of the field To make the next accelerator *after* the ILC technically feasible and affordable 1/24/2006 EPAC 12

13 Near Term Program: Science Now or Soon B-factory GLAST SLAC Participation in the LHC 1/24/2006 EPAC 13

14 B-Factory Program PEP-II Accelerator Collides e+ and e- with unequal beam energies at E CM =10.58 GeV Premier tool for studying physics of heavy flavor BaBar Detector Optimized for B-physics at asymmetric energy collider Run by International Collaboration of ~623 physicists from 80 institutions in 11 countries Program of Rich Physics B-factory program operates until end of FY2008 Ultimate goal: Deliver to BaBar: ~1ab-1 end of FY2008 Laboratory committed to delivering luminosity Journal Papers < Total BABAR Belle /24/2006 EPAC 14

15 Machine Performance 1/24/2006 EPAC 15

16 1/24/2006 EPAC 16

17 1/24/2006 EPAC 17

18 GLAST GLAST: γ-ray Large Area Space Telescope GLAST measures direction, energy and time of celestial gamma rays from 20MeV 300 GeV Gamma rays probe cosmological distances in a largely unexplored energy range Great potential for Discoveries: Fundamental Physics (dark matter,..) Cosmic Particle Acceleration (SNR, jets,..) Physics of Relativistic Outflows (GRB s, Pulsars,..) Joint Particle Physics/Particle Astrophysics venture Involves 5 nations, 9 funding agencies Fabrication project has been challenging! Project successfully rebaselined summer 03 after CNES withdrew financial support Transition to flight production much more painful than anticipated and production anomalies summer/fall led to second rebaseline winter 05 1/24/2006 EPAC 18

19 LAT Instrument 1/24/2006 EPAC 19

20 LAT Instrument Anti-Coincidence (ACD): Segmented (89 tiles). high energy limited detection efficiency (overall). Tracker/Converter (TKR): Silicon strip detectors. W conversion foils. 80 m 2 of silicon (total) electronics chans. High precision tracking, small dead time. Calorimeter (CAL): 1536 CsI crystals. 8.5 radiation lengths. Hodoscopic. Shower profile reconstruction (leakage correction) 1/24/2006 EPAC 20

21 ..\My Documents\My Pictures\16Tower_rotated.gif 1/24/2006 EPAC 21

22 ACD Installed 1/24/2006 EPAC 22

23 GLAST Moving Forward Instrument is assembled and in final testing Ship to NRL for environmental testing at end of February Delivery to Observatory Integration in summer Mate with spacecraft and GBM and test Launch 8/07 Kennedy Space Flight Center Focus at SLAC transitioning to build up of ISOC and preparation for science 1/24/2006 EPAC 23

24 SLAC Participation in LHC Motivations: Energy frontier Physics. Synergy between LHC and ILC. Experience in detector and operations relevant for ILC. To maintain a healthy work force for ILC Strong user interest from traditional SLAC user community Our experience on detector/computing are seen as valuable assets which could help ATLAS to prepare for the first physics at LHC. The M&S cost is moderate and should be able to fit more flexibly into the Lab budget. Good synergy with existing LARP participation Strongly supported by our theory community 1/24/2006 EPAC 24

25 Proposed Areas of Involvement Specific proposal for SLAC participation in ATLAS developed under leadership of Su Dong and Charlie Young Four related items: Pixel detector Trigger Simulation Tier 2 computing center Simulation production Calibration. Primary location for physics analysis. A really functional Tier 2 requires much more than keeping a bunch of boxes running. Proposal for SLAC to join ATLAS is being presented to you at this meeting Also considered CMS option 1/24/2006 EPAC 25

26 Possible SLAC Physicist Profile Trigger Simulation Pixel Analysis TBD FTE Year 1/24/2006 EPAC 26

27 R&D for science in the next decade: 2010 and beyond ILC LSST JDEM EXO 1/24/2006 EPAC 27

28 ILC High Energy e+e- LC highest priority new machine for world community SLAC has led field in development of LC design and technology Champion of warm RF technology How has the cold technology choice impacted the lab? SLAC has always been committed to playing a leadership role in ILC independently of choice of RF technology SLAC has accelerator expertise in all subsystems of the collider R&D program now restructured to address critical issues for cold machine SLAC fully supports GDE effort SLAC staff are co-leading 4 of the technical subgroups 1/24/2006 EPAC 28

29 ILC Machine R&D activities Restructured R&D program to align with the cold decision Accelerator Design and CDR e+e- sources Damping ring design Beam Delivery System Instrumentation and control systems All being done as part of the coordinated GDE effort Some accelerator R&D may be directed for additional support e.g. L-band power sources Goals for near term: End of CY05: Select baseline configuration design End of CY06: CDR Goals longer term: CY08/09: TDR 1/24/2006 EPAC 29

30 ILC Detector Program Need to grow program of linear collider detector R&D SLAC is working with LBNL and FNAL to provide opportunities for user community to engage Simulation Effort Supports national and international effort Concept development for a detector based on Silicon One of several approaches in the community Effort is investment limited particularly engineering Opportunities to grow with GLAST roll off You will hear a report on the status at this meeting 1/24/2006 EPAC 30

31 LSST-Large Synoptic Survey Telescope 8.4 m ground based telescope Wide field of view Weak lensing survey of entire sky Dark matter power density spectrum Constraints on Dark Energy Proposed as joint DOE/NSF project SLAC lead lab on camera development First light ~2012 R&D effort growing with GLAST roll off LSST proposal in front of you at this meeting * Dark matter and dark energy with weak lensing Full LSST survey will cover 20,000 square degrees, and resolve over 4 billion high-redshift (z 3) galaxies! * Dark matter and dark energy with supernovae LSST will detect 250,000 type I-a supernovae (z 1) per year! * Cluster survey and baryon oscillations. * Gravitational micro-lensing. * Strong galaxy & cluster lensing: physics of dark matter. * Multi-image lensed SN time delays: separate test of cosmology. * QSO time delays vs z: independent test of dark energy. 1/24/2006 EPAC 31

32 The LSST Collaboration Brookhaven National Laboratory Harvard-Smithsonian Center for Astrophysics Johns Hopkins University Las Cumbres Observatory Lawrence Livermore National Laboratory National Optical Astronomy Observatory Ohio State University Pennsylvania State University Research Corporation Stanford Linear Accelerator Center Stanford University University of Arizona University of California, Davis University of Illinois University of Pennsylvania University of Washington 1/24/2006 EPAC 32

33 LSST Camera (shown with the secondary mirror of the telescope) 2m 1/24/ FOV EPAC 3.2 Giga-Pixel 10 µm CCD Array 33

34 JDEM/SNAP 2m space based telescope LBNL lead lab Study high z SNe Dark Energy Weak Gravitational lensing Dark Matter Strong Lensing Small scale structure Joint project DOE and NASA SLAC involvement in OCU and possibly electronics R&D effort growing with GLAST roll off Anticipate full proposal at next meeting 1/24/2006 EPAC 34

35 EXO: Enriched Xenon Observatory Search for ββ0ν decay in 136 Xe--> 136 Ba ++ e - e - EXO Philosophy Excellent energy resolution (separates ββ0ν from ββ2ν) Positive ID Ba Ion (Ba tagging) Strategy: Currently EXO 200 is being built Study detector performance (no Ba+ tagging) Look at backgrounds Measure 2νββ mode with 1-2 year run Sensitivity of ~0.2 ev to 0νββ mode Continue R&D on Ba tagging for next 2-3 years In parallel with EXO 200 operations Successful R&D would lead to proposal for full EXO (ton scale experiment) EXO goal: <m νe >~10 s of mev 1/24/2006 EPAC 35

36 Strategic Elements of Accelerator Research Accelerator Research for Future Machines High Gradient Studies for CLIC type machine Development of L-band power sources for ILC Proof of Principle Studies of New Acceleration Mechanisms: Plasma Acceleration Laser Acceleration 1/24/2006 EPAC 36

37 Accelerator Research for Future Machines Accelerator Research for ILC We are developing plans for R&D effort into alternative sources of L-band power for ILC Plug and play replacement to multi beam klystron at lower cost More innovative technologies: high risk but high gain High Gradient R&D for e+e- colliders past the ILC National program being encouraged by DOE Redirecting some of resources (people) from warm RF R&D to these efforts 1/24/2006 EPAC 37

38 Proof of Principle Studies of New Acceleration Mechanisms Accelerator Research E164/E164X running successfully (Plasma wake field acceleration) Talk by Mark Hogan Limited by finite lifetime of FFTB Laser acceleration experiment progressing in NLCTA Demonstrate and develop new methods for accelerating electrons with laser radiation using solid-state structures First runs this year ion column F = -ee z e- 1/24/2006 EPAC 38

39 SABER SABER (FFTB replacement) in proposal development White paper outlining science case and project description 1/24/2006 EPAC 39

40 SABER Scientific Opportunities Plasma Wakefield Acceleration and Beam-Plasma Physics Continuation of successful plasma acceleration program Extend to positrons Magnetism and Solid State Physics Use intense E and B fields associated with the electron bunches Studies of ultra-fast magnetization dynamics Intense THz Light Source for Surface Chemistry SABER can produce ultra-short pulse of coherent THz radiation Studies of dissociation of aligned molecules at a surface & other surface chemistry experiments Laboratory Astrophysics Experiments Calibration of cosmic ray observational techniques Studies of dynamics of jet-plasma interactions Inverse Compton Scattered Beam Photon energies to 18 GeV 1/24/2006 EPAC 40

41 SABER Parameters Energy Charge per pulse Pulse length at IP (σ z ) Spot size at IP (σ x,y ) Momentum spread Momentum dispersion at IP (η and η ) Drift space available for experimental apparatus Adjustable up to 30 GeV nominal GeV when the Bypass Line is used concurrently with PEP-II operation. 2 x (3 nc) electrons or positrons per pulse. 30 μm 10 μm nominal (5.2 x 5.4 μm achieved in computer simulations). 4 % full width with full compression. 0 2 m from last quadrupole to focal point. Approximately 23 m from focal point to Arc 3 magnets. This space will be available for experimental use and for the dump line system, depending on user requirements. Further expansion is possible by removing unused arc magnets downstream. 1/24/2006 EPAC 41

42 Looking Forward 1/24/2006 EPAC 42

43 Vision for HEP at SLAC Highest priority is given to B-factory operations through FY2008 Delivery of science to our largest user community Other program elements ILC/LCD We hope resources saved to HEP by transfer of responsibility of accelerator operations to BES and eventual termination of B-factory program will be used to help build up national ILC R&D program New and other reprogrammed resources will also be essential We will compete through GDE process for some of those resources We anticipate an aggressive growth model for ILC program at SLAC This must be matched by aggressive growth in the national program 1/24/2006 EPAC 43

44 Vision for HEP at SLAC Other program elements (cont.) Non-accelerator based programs will grow SLAC Participation in LHC We will continue at roughly constant level: Accelerator R&D Theory 1/24/2006 EPAC 44

45 PPA Goals for 2009 Vibrant particle physics and particle astrophysics programs ILC LHC GLAST and BaBar data Non-Accelerator Experiments (LSST, EXO, SNAP ) Strong support for operating accelerator program (LCLS) transferred to photon science management Thriving cross disciplinary programs Accelerator Research Scientific Computing Strategic decisions now are focused on achieving these goals 1/24/2006 EPAC 45

46 Summary Enormous opportunities for world class science at SLAC SLAC s programs and leadership central to national and international effort Programs are science driven, innovative, flexible and responsive to scientific drivers 1/24/2006 EPAC 46